{
  "pools": {
    "A-new": {
      "servers": [ "localhost:12345" ]
    },
    "A-old": {
      "servers": [ "localhost:12346" ]
    },
    "B-new": {
      "servers": [ "localhost:12347" ]
    },
    "B-old": {
      "servers": [ "localhost:12348" ]
    }
  },
  "route": {
    "type": "FailoverWithExptimeRoute",
    "failover": {
      "type": "MigrateRoute",
      "from": "PoolRoute|B-old",
      "to": "PoolRoute|B-new",
      "start_time": START_TIME,
      "interval": 4
    },
    "normal": {
      "type": "MigrateRoute",
      "from": "PoolRoute|A-old",
      "to": "PoolRoute|A-new",
      "start_time": START_TIME,
      "interval": 4
    }
  }
}
